Blade sharpening device



1934- A. JESSEN 1,969,611

BLADE SHARPENING DEVICE Filed Nov. 17, 1933 2 Sheets-Sheet l Inventor Z.14. tfessen /I Home y Aug. 7, 1934 A, JESSEN BLADE SHARPENING DEVICEFiled Nov. 1'7, 1933 2 Sheets-Sheet 2 Patented Aug. 7, I934 i ssasnl-'VBLADE sHaRrENindiEvmE Leslie A; Jessen, Sycamoreplll. I ApplicationNovember 17, 1 933, "iS erial N o.'fil 8,533

1 Claim; (Cl. 1-20 5 This invention relates to an improved bladesharpening device possessing diversified structural characteristicscoordinated to .provide a unique implement susceptible of practicaluseBi in sharpening blades of tools and articles of cutlery, particularlyhousehold accessories, such as scissors, kitchen knives and the like.

In carrying the principles of the basic idea into actual practice, Ihave evolved and produced a simple and economical device comprising anabradant element holder or clip carried by a manually manipulatedactuator'including a blade backing and guiding plate and a convenientlyassociated finger grip.

Generically stated, I have invented and perfected a plurality of formsof the invention in which the aforesaid characteristics will be found tobe common and wherein each form or embodiment of the invention possessescertain struc- .20 tural refinements and features best adapted tocooperate with predeterminedtypes of cutting blades, such as the bladesof scissors, knives, wood-working tools and the like.

In the accompanying drawings wherein like numerals are employed todesignate like part throughout the views:-

Figure .1 is a perspective view of one embodiment of the inventionshowing the manner in which it is adjusted for use in sharpening theblade of a conventional kitchen knife. t Figure 2 is a perspective viewof the same device showing the manner in'which it is arranged oradjusted for sharpening the beveled cutting edge of the blade of a pairof conventional scissors.

Figures 3, 4 and 5 constitute a group perspective view of the parts ofthe device shownin Figures 1 and 2, said. parts being disconnected.

Figure 6 is a View showing a slightly different embodiment of theinvention wherein the abradant block clip or holder is rigid or fixed.

Figures 7 and 8 are detail perspective views of the assembly shown inFigure 6.

Figure 9 is a perspective view of a still further embodiment of theinvention, showing the manoftlie deviceshown inFigures l to 5 inclusive.Referring especially to Figures 3 and 4, it .will be observed that thisdevice. or form of the in vention is. made up essentiallyof twocompanion parts 12 and. 13 respectively. -The part'12 may lee-describedas .the' movable actuator, this being the formxof a. sheet: metal=unitformed from a single stamping of metalbent upon itself to define asubstantially rectangular blade backing 1 and ,guidingplate .14 and acentralizedrightangular'lydisposed fingerigrip 15. The features 14 and15 are: united by bending the metal upon itself,fias indicated at16.."The upper edge :of the backing plate is provided with ahingedknuckle 117 to cooperate with complemental knucklesl8 and 19 carried bythe part 13.' "This part 13 is in the form of a holding clip for theabrasive block 20. It possesses requisite inherent resiliency to'holdtheblock 20. frictidnally but i'cmovably between itsjaws. The upper jawhasthrough :the thenaligned'knuckles 17, 18 and 19;

Thisuse'rves to 'hinge'dly'conne'ct the block holding clip. 13 to theadaptation actuator or unit 12. The meeting threads between thepin '24and knuckle 19: permits the clip 13=to be adjusted to an obtuseangularp'osition, as shown: in Fig-'- ure'l,. iorisharpening. the bladeB of the knife 25. Or the holder clip 13 can be adjusted to the rightangular position shown in Figure 2 and held in this position forsharpening the blade A of thescissors 26. Thus in this embodiment of theinvention, we have an actuator unit 12 including a backing plate 14, thefinger grip 15, and an abradant block holdingclip 13' hingedly connectedto the backing plate Sand adjustable to the desired angular positionfor) sharpening a predetermined type of blade.

The style or form of the invention illustrated in'Figures 6 and 7 is inthe form of a one-piece unit diiferentiated by the numeral -27. Thefeatures of this form of the invention are quite similar to thosealready described; Referring to Figure 7 for example, it will beobserved that the numeral 28 designates a guiding andback- "is I ingplate for the blade and 29 an integral rightangularly disposed andproperly centralized noted .by the numeral 38.. permanent partof thebacking plate and ine finger grip 29. Here the U-shaped clip 30 isformed as an integral part and the free end of the upper jaw providedwith an entrance lip '31 and the lower jaw provided with a stop cleatmentary block-like portion of a file can be used, 7

especially for sharpening wood-Working tools.

Coming now to Figures 9 and 10, this em bodiment or form of theinventionis differen tiated by the numeral 34 and possesses commoncharacteristics found in the twoiforms .ofi-the invention alreadydescribed. Itwill be observed, I

for example, that, the numeral '35 designatesa substantially rectangularbacking and guide;

plate having one edge portion bent upon itself, as indicated. at. 36,'and terminating .in a rightangularly disposed finger grip.or:flange537.The U-shaped. abradant'block holding clip is de- It is formed as a steadof occupying the. rightangular position shown in Figure 7,: ithasasubstantially obtuse angular position fixed to dispose the block in anatural inclined or oblique sharpening position. The numeral 39designates the ofiset'lipon the upper jaw and. 40 indicates the stopelement; Inthis form of the invention, as well as in the form-shown inFigure 1, attention is called to the'numeral 41'which serves todesignate an offset part of the. U-shaped holder or clip. This isdesigned so as to provide aclearance space, such as is indicated at 42in Figure 9. In other words, this acts as a clearance space for thecutting edgeof the blade .onone side of the blade '5; the U-shapedblockholder, whether the-holder be hingedor rigid.

Inall three forms of the inventiongit is obvious that theabra'dantzblockL is resiliently clamped between the jaws of the U-shapedholder-.or clip. This clip occupies varied angular positions; withrespect'xtojthe 'coi-ordinated"ac.-: tuator. unit. The:.actuator unitembodies -a backing plate; and av suitablyarranged finger grip.v Thus byinserting the-block and holding the tool in one hand and grasping. .the:finger grip. between the thumb and fingers of theother hand, the-entiresharpener as-a unit can be reciprocatedback. and. forth in slidingcontact a screw threads.

with the blade somewhat as shown in the drawings for the purpose ofsharpening the cutting edge of the blade.

The form of the device shown in Figure 1 is especially desirable becauseof the hinged mounting of the U-shaped clip 13 and the provision of theset screw 23 which serves as a follower to feed the block 20 out of theclip as it be comes worn. This form of the invention is also desirable,due to the coaction of the" screw threads on the hinge screw 24 and thehinge knuckle 19 which permits the clip 13 to be adjusted to theposition shown in Figurel or the position shown in Figure 2 orintermediate positionand held in this position by tightening the Figure7 functions very much in the same manner "as the "arrangement depictedin Figure 2, beingdesirable under certain conditions, due

to the fact that the clip 30 is formed rigidly or iritegrallyxwith-thecomplemental actuating unit. The same istrue of the arrangement shown inFigures 9 and 10, althoughin neither of. the latter two forms of theinvention does the user have the'range of adjustment found in theembodimentshown in Figureil. 11. a It is thought that the'description,taken in connection With the drawings, will enable a clear understandingof the: invention 'to be had. Therefore, a. more lengthy description isthought unnecessary. 1 x a Y .-While. the preferred embodiment of thein-' ventionhas been shown and described, it is to be understood thatminor changes comingwithin the field of invention claimed may beresorted to if desired.

- What I c1aim.is: I As a new article of manufacture, an'actuating unitcomprising a single. metalstamping bent upon itself to form abackingplate and a rightangularly disposed finger grip for moving thebacking plate .backand forth with respect .to the blade to be sharpened,said backing plate being formed on its upper edgewith a hinge pinknuckle, a substantially; U-shapedfi abradant block holding clip, saidclip having its lower' jaw formed with hinge knuckles aligned with saidfirst. named knuckle, one of the second named knuckles being screwthreaded, a hinge pin passing through said knucklesrand having athreaded end cooperating with the aforesaid screw threads to permit theclip to be adjusted to and held in apredetermined adjusted position withrespect to, the backing plate, saidknuckle-equipped jaw being formedwith a stop. element, and a set screw carried-by said clip'to aid inholding and adjusting the abradantblock.

. Y LESLIE A..JESSEN.

